- Polymorphism refers to the ability of different objects to respond to the same message (method call) in different ways.
- len() is a built-in Python function that can be applied to any object that supports the concept of "length" or "size".
- Polymorphism in object-oriented programming allows for methods with the same name to behave differently depending on the object that calls them.
- Each subclass inherits methods from the superclass and can override methods as needed.
- You can use isinstance() function to check if an object is an instance of a specified class or if it is an instance of a subclass of that class.